Space Time & Motion A.3 Work Energy and Power (id: 69faa6aa0)

本题目来源于试卷: Space Time & Motion A.3 Work Energy and Power，类别为 IB物理学

[单选题]
A box is pulled by a child with a horizontal force of $5\;N$. The box moves a horizontal distance of $4\;m$ in a time of $2\;s$. The average power delivered by the child to the box is

A. $2.5\;W$
B. $5.0\;W$
C. $10\;W$
D. $40\;W$


参考答案:  C


本题详细解析:

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